CN1818105B - Production of micro-carbon solder iron - Google Patents
Production of micro-carbon solder iron Download PDFInfo
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- CN1818105B CN1818105B CN 200610049958 CN200610049958A CN1818105B CN 1818105 B CN1818105 B CN 1818105B CN 200610049958 CN200610049958 CN 200610049958 CN 200610049958 A CN200610049958 A CN 200610049958A CN 1818105 B CN1818105 B CN 1818105B
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Abstract
The invention is about the process of the chrome iron with little carbon. It includes: (1) breaking up the material: grinding the chrome iron with high carbon into the powder; (2) put the mixture of powder and the oxidate which ratio is 1: 1-1.5 into the vacuum medium-frequency furnace; (3) the temperature of the furnace is 1200-1350 DEG C and the vacuum degree is higher than 6*10-1 Pa, when the react finish, the temperature is improved to above 1600 DEG C; (4) When the chrome iron melts to liquid, it is lead out from the furnace and cast, so we can get the chrome iron with 0.15% carbon or thechrome iron with 0.03% carbon. The process can save the cost and decrease the production taches.
Description
Technical field
The present invention relates to a kind of production technique of iron alloy, mainly is a kind of production technique of extra low carbon ferrochromium.
Background technology
Iron alloy is that three parts are formed by manganese system, chromium system, silicon mainly, and extra low carbon ferrochromium, ultra micro carbon ferrochrome and nitrided ferro-chromium are that chromium is an important branch in the product, are used for the interpolation element that special steel is produced.
Industrial process mainly contains two kinds at present:
1, electric furnace process: be with raw produce such as chrome ores in ore-smelting furnace, smelt into high carbon ferro-chrome.Its current consumption is about 3000 degree.The high carbon ferro-chrome secondary is entered ore-smelting furnace, add auxiliary materials such as silica, smelt into silicochrome.Its current consumption is about 5000 degree.At last silicochrome is sent in the electric refining furnaces, auxiliary materials such as adding lime are smelted into extra low carbon ferrochromium.Its current consumption is about 2000 degree.
2, vacuum resistance oven process: high carbon ferro-chrome is broken into powder, enter rotary kiln and carry out oxidation prereduction and oven dry, add caking agent and utilize the hydropress briquetting, send into vacuum resistance furnace after toasting then and heat decarburization generation extra low carbon ferrochromium (vacuum method extra low carbon ferrochromium).Send into vacuum resistance furnace and come out of the stove whole process need more than 80 hours, more than power consumption 5000 degree per ton to product.
Because aforementioned production method is perfect inadequately, the production cost height, the cycle is long, energy consumption is big, investment is big, and therefore, adopting a kind of new production technique to produce extra low carbon ferrochromium is the problem that iron alloy manufacturing enterprise pays close attention to.
Summary of the invention
Purpose of the present invention is just in order to overcome the deficiency of above-mentioned technology, and provides a kind of facility investment little, and smelting cycle is short, and can significantly reduce the production technique of the extra low carbon ferrochromium of power consumption.
The present invention solves the technical scheme that its technical problem adopts: the present invention adopts in the intermediate frequency furnace of sealing process such as high carbon ferro-chrome powder and oxide compound being heated, vacuumize smelting; Make high carbon ferro-chrome promptly begin decarburization at solid state, after the high carbon ferro-chrome decarburization finishes, come out of the stove when being fused into liquid, single stage method production obtains extra low carbon ferrochromium or ultra micro carbon ferrochrome.
The production technique of this extra low carbon ferrochromium mainly may further comprise the steps:
1.1), raw material pulverizing: blocky high carbon ferro-chrome is broken into small-particle, and wears into the high carbon ferro-chrome powder;
1.2), feed proportioning advances stove: fully stir add oxide compound in the high carbon ferro-chrome powder after, its mol ratio is a carbon: oxide compound=1: 1-1.5, put into the intermediate frequency furnace that can vacuumize smelting;
1.3), production process: send electricity heating, temperature is controlled at 1200-1350 degree Celsius, vacuumizes, and vacuum tightness should be higher than 6 * 10 in the stove
-1Pa when the combination reaction of material in the stove is finished substantially, brings up to temperature in the stove more than 1600 ℃;
1.4), extra low carbon ferrochromium comes out of the stove: when the ferrochrome that reaction finishes is fused into liquid fully, remove negative pressure of vacuum, tapping casting, whole process be less than 4 hours, promptly obtains carbon content and be extra low carbon ferrochromium below 0.15% or carbon content and be the ultra micro carbon ferrochrome below 0.03%.
Oxide compound of the present invention adopts ferric oxide or iron protoxide or Z 250 or chromium trioxide or chromium sesquioxide, if need in ferrochrome product under the situation of other metal or permission, also can add other metal oxide.
The logical in process of production nitrogen of the present invention can obtain the product of the nitrided ferro-chromium of molten nitrogen again: when the combination reaction in the stove is finished substantially, controlled temperature is at 1200-1350 degree Celsius, stop to send electricity or small power to send, feed nitrogen then immediately, nitriding treatment is carried out in pressurization, feeding temperature-raising is brought up to more than 1600 ℃ again when nitrogenizing reaction finishes substantially, comes out of the stove after the pressure relief, can obtain the product of the nitrided ferro-chromium of molten nitrogen.
Intermediate frequency furnace used in the present invention can vacuumize and pressurize for transforming back equipment.On body of heater, also be provided with safety valve and explosion-proof equipment, to guarantee production safety.
The invention has the beneficial effects as follows: the present invention adopts vacuum intermediate frequency oven process, on the basis that intermediate frequency furnace is heated, adopts the vacuum metling decarburization, goes out extra low carbon ferrochromium, ultra micro carbon ferrochrome or nitrided ferro-chromium from the disposable direct production of high carbon ferro-chrome; Not only reduce production link, saved facility investment, and can significantly reduce power consumption, reduced energy consumption.
Embodiment
The present invention is further detailed explanation below in conjunction with concrete mode.
Embodiment 1: the production technique of this extra low carbon ferrochromium, and adopt bogey (feeding 100 kilograms) to carry out experimental production, mainly may further comprise the steps:
1.1), raw material pulverizing: is that small grain size below 1 centimeter is worn into less than 200 purpose high carbon ferro-chrome powders through pulverizing mill then with blocky high carbon ferro-chrome (its chemical ingredients: C content 8.1%, contain Cr amount 63.5%, si content 0.87%, P content 0.03%, contain S amount 0.025%) through crusher in crushing;
1.2), feed proportioning advances stove: fully stir add the oxide compound ferric oxide in the high carbon ferro-chrome powder after, its mol ratio is a carbon: oxide compound=1: 1-1.5, put into the intermediate frequency furnace that can vacuumize smelting; Add 40 kilograms of ferric oxide in the present embodiment, content 90%, granularity, carries out suitably crossing joining according to the C content 8.1% of high carbon ferro-chrome less than 400 purpose powders, (can add chromated oxide for improving chrome content during ordinary production).
1.3), production process: will be whole send electricity after the stove sealing, driving vacuum pump is 6 * 10 to highest attainable vacuum
-1More than the pa; Send electric power to be controlled at 50kw about three hours,, improve and send electric power, temperature in the stove is brought up to 1600-1650 degree Celsius to 120kw when temperature reaches Celsius 1350 when spending;
1.4), extra low carbon ferrochromium comes out of the stove: when the ferrochrome that reaction finishes is fused into liquid fully, remove negative pressure of vacuum, tapping casting is in ingot mould, and whole process is less than 4 hours, promptly obtains carbon content and be extra low carbon ferrochromium below 0.15% or carbon content and be the ultra micro carbon ferrochrome below 0.03%.
Be 0.13% through chemically examining its C content, contain that the Cr amount is 55.6%, other content is constant substantially, power consumption is 2100 degree/tons as calculated.If but carry out pilot scale or normal Large Furnace production, and its power consumption also will descend significantly, and initial estimate is 1300 degree/tons.Because of testing under the restriction of carrying out appropriate reconstruction at existing installation, sealing property and vacuum metling state as further raising stove, also will improve the decarburization capacity of product, and can produce fully and be lower than the little carbon of C content below 0.15% and the vacuum chromium iron product of ultra micro carbon.
Embodiment 2: the production technique of this nitrogenize extra low carbon ferrochromium mainly may further comprise the steps:
1.1), raw material pulverizing: blocky high carbon ferro-chrome is broken into small-particle, and wears into the high carbon ferro-chrome powder;
1.2), feed proportioning advances stove: fully stir add the oxide compound ferric oxide in the high carbon ferro-chrome powder after, its mol ratio is a carbon: oxide compound=1: 1-1.5, put into the intermediate frequency furnace that can vacuumize smelting;
1.3), production process: send electricity heating, temperature is controlled at about 1300 degree Celsius, vacuumize, vacuum tightness should be higher than 6 * 10-1pa in the stove, when the combination reaction of material in the stove is finished substantially, controlled temperature is at 1200-1350 degree Celsius, stop to send electricity or small power to send, feed nitrogen then immediately, nitriding treatment is carried out in pressurization, and feeding temperature-raising is brought up to more than 1600 ℃ again when nitrogenizing reaction finishes substantially, comes out of the stove after the pressure relief, can obtain the product of the nitrided ferro-chromium of molten nitrogen, it is produced current consumption and is about the 2000kw.h/ ton.
The present invention produces extra low carbon ferrochromium and compares with present electric furnace, vacuum resistance furnace, simplifies the multiple tracks production technique, has reduced facility investment, has shortened tap to tap time significantly.Thereby improved the product output and reduced power consumption significantly.Should this be a kind of novelty, comparatively ideal (vacuum) extra low carbon ferrochromium, ultra micro carbon ferrochrome and nitrided ferro-chromium production method.
Embodiment 3: difference from Example 1, oxide compound are to adopt iron protoxide, and its mol ratio is a carbon: iron protoxide=1: 1-1.5.
Embodiment 4: difference from Example 1, oxide compound are to adopt Z 250, and its mol ratio is a carbon: Z 250=1: 1-1.5.
Embodiment 5: difference from Example 1, oxide compound are to adopt chromium trioxide, and its mol ratio is a carbon: chromium trioxide=1: 1-1.5.
Embodiment 6: difference from Example 1, oxide compound are to adopt chromium sesquioxide, and its mol ratio is a carbon: chromium sesquioxide=1: 1-1.5.
Claims (3)
1. the production technique of an extra low carbon ferrochromium, it is characterized in that: this technology mainly may further comprise the steps:
1.1), raw material pulverizing: blocky high carbon ferro-chrome is broken into small-particle, and wears into the high carbon ferro-chrome powder;
1.2), feed proportioning advances stove: fully stir add oxide compound in the high carbon ferro-chrome powder after, its mol ratio is a carbon: oxide compound=1: 1-1.5, put into the intermediate frequency furnace that can vacuumize smelting;
1.3), production process: send electricity heating, temperature is controlled at 1200-1350 degree Celsius, vacuumizes, and vacuum tightness should be higher than 6x10 in the stove
-1Pa when the combination reaction of material in the stove is finished substantially, brings up to temperature in the stove more than 1600 ℃;
1.4), extra low carbon ferrochromium comes out of the stove: when the ferrochrome that reaction finishes is fused into liquid fully, remove negative pressure of vacuum, tapping casting, whole process be less than 4 hours, promptly obtains carbon content and be extra low carbon ferrochromium below 0.15% or carbon content and be the ultra micro carbon ferrochrome below 0.03%.
2. the production technique of extra low carbon ferrochromium according to claim 1 is characterized in that: described oxide compound employing ferric oxide or iron protoxide or Z 250 or chromium trioxide or chromium sesquioxide.
3. the production technique of extra low carbon ferrochromium according to claim 1, it is characterized in that: when the combination reaction in the stove is finished substantially, controlled temperature is at 1200-1350 degree Celsius, stop to send electricity or small power to send, feed nitrogen then immediately, nitriding treatment is carried out in pressurization, and feeding temperature-raising is brought up to more than 1600 ℃ again when nitrogenizing reaction finishes substantially, come out of the stove after the pressure relief, can obtain the product of the nitrided ferro-chromium of molten nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610049958 CN1818105B (en) | 2006-03-22 | 2006-03-22 | Production of micro-carbon solder iron |
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| CN 200610049958 CN1818105B (en) | 2006-03-22 | 2006-03-22 | Production of micro-carbon solder iron |
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| CN1818105A CN1818105A (en) | 2006-08-16 |
| CN1818105B true CN1818105B (en) | 2010-04-21 |
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| CN 200610049958 Expired - Fee Related CN1818105B (en) | 2006-03-22 | 2006-03-22 | Production of micro-carbon solder iron |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117431356A (en) * | 2023-12-20 | 2024-01-23 | 山西泰峰合金有限公司 | Process and equipment for preparing micro-carbon ferrochrome by using hydrogen |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703793B (en) * | 2012-04-09 | 2014-05-07 | 西峡县中嘉合金材料有限公司 | Production method of low-carbon nitrided ferrochrome |
| DE102013201104A1 (en) * | 2013-01-24 | 2014-07-24 | H.C. Starck Gmbh | Process for the production of chromium nitride-containing spray powders |
| CN103695672B (en) * | 2013-12-02 | 2016-01-20 | 吴正锡 | Medium-frequency induction furnace produces the method for ferrochrome |
| CN104233046B (en) * | 2014-09-16 | 2017-04-05 | 江苏鼎跃金属制品有限公司 | A kind of production method of nitrided ferro-chromium |
| CN106591686A (en) * | 2017-01-19 | 2017-04-26 | 西峡县中嘉合金材料有限公司 | Production technology of high-purity micro-carbon ferrochromium |
| CN110607445A (en) * | 2019-09-10 | 2019-12-24 | 抚顺市鑫隆硅镁铬有限公司 | Production method of low-micro-carbon ferrochrome |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB800205A (en) * | 1954-12-19 | 1958-08-20 | Union Carbide Corp | Decarburizing high-carbon ferrochromium |
| CN1379119A (en) * | 2001-04-09 | 2002-11-13 | 林冬华 | Process for preparing ferrochromium nitride |
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2006
- 2006-03-22 CN CN 200610049958 patent/CN1818105B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB800205A (en) * | 1954-12-19 | 1958-08-20 | Union Carbide Corp | Decarburizing high-carbon ferrochromium |
| CN1379119A (en) * | 2001-04-09 | 2002-11-13 | 林冬华 | Process for preparing ferrochromium nitride |
Non-Patent Citations (4)
| Title |
|---|
| 【苏】M﹒A﹒雷斯.铁合金冶炼 1.冶金工业出版社,1981,231-236. * |
| 戴维，舒莉.铁合金冶金工程 1.冶金工业出版社,1999,265-268. * |
| 王世拥.真空固态脱碳生产微碳铬铁的质量控制.铁合金 3.1998,(3),14-17,25. |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117431356A (en) * | 2023-12-20 | 2024-01-23 | 山西泰峰合金有限公司 | Process and equipment for preparing micro-carbon ferrochrome by using hydrogen |
| CN117431356B (en) * | 2023-12-20 | 2024-03-12 | 山西泰峰合金有限公司 | Process and equipment for preparing micro-carbon ferrochrome by using hydrogen |
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| CN1818105A (en) | 2006-08-16 |
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